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		<title>Document</title>
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		<script>
			function Father(uname, age) {
				this.uname = uname;
				this.age = age;
			}

			function Son(uname, age, score) {
				Father.call(this, uname, age);
				this.score = score;
			}

			let son = new Son('vae', 35, 100);

			console.log(son);
		</script>
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